Service question from AP noob

[ghotihead2001]

I just purchased an immaculate 15300 from DavidSW. Phenomenal transaction as always.

The papers are stamped 12/1/10 and the watch came LNIB.

I spoke to a woman at the Clearwater SC and she seemed to be pushing for a full service and water resistance check, her reasoning being that the watch likely sat unworn for the majority of the 2 year period and maybe the oils dried up/sedimented/whatnot. As per the manufacturer recommendations the watch is only due for a water resistance check.

So here are my questions:

1. Is a full service needed at this point?
2. Do most of you perform the water resistance check like clockwork every 2 years (pardon the pun).